# print("hello world");

a=10
b=30
#算术运算符
# print(a+b);
# print(a-b);
# print(a*b);
# print(a/b);
# print(a//b);
# print(a%b);
#比较运算符
# print(a!=b);
# print(a==b);
# print(a>b);
# print(a<b);
# print(a>=b);
# print(a<=b);
#成员运算符
list1=[1,20,50,10]
print(a in list1);
print(b in list1);